28318000 has 40 divisors (see below), whose sum is σ = 68477760. Its totient is φ = 11326400.

The previous prime is 28317997. The next prime is 28318009. The reversal of 28318000 is 81382.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (28318009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5080 + ... + 9079.

It is an arithmetic number, because the mean of its divisors is an integer number (1711944).

Almost surely, 2^28318000 is an apocalyptic number.

28318000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28318000 is an abundant number, since it is smaller than the sum of its proper divisors (40159760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28318000 is a wasteful number, since it uses less digits than its factorization.

28318000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14182 (or 14166 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 28318000 is about 5321.4659634353. The cubic root of 28318000 is about 304.8041383373.

Adding to 28318000 its reverse (81382), we get a palindrome (28399382).

The spelling of 28318000 in words is "twenty-eight million, three hundred eighteen thousand".